<template>
  <div>
     <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
  </el-breadcrumb>
  <!-- 卡片视图区域 -->
  <el-card>
    <!-- 添加角色按钮区域 -->
    <el-row>
      <el-col>
        <el-button type="primary"  @click= "addDialogVisible = true">添加角色</el-button>
      </el-col>
    </el-row>
    <!-- 角色列表区域 -->
    <el-table :data= "rolesList" border stripe row-key="id">
      <!-- 展开列 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row :class= "['bdbottom', i1 === 0 ? 'bdtop':'','vcenter']" v-for= "(item1, i1) in scope.row.children" :key= "item1.id">
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightsById(scope.row, item1.id)">
                {{item1.authName}}
              </el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级权限 -->
            <el-col :span="19">
              <el-row :class= "[i2 === 0 ? '' : 'bdtop','vcenter']" v-for= "(item2, i2) in item1.children" :key= "item2.id">
                <!-- 二级权限 -->
                <el-col :span= "6">
                  <el-tag type="success" closable @close="removeRightsById(scope.row, item2.id)">
                    {{item2.authName}}
                  </el-tag>
                  <i class="el-icon-caret-right"></i>
                  </el-col>
                <!-- 三级权限 -->
                <el-col :span= "18">
                  <el-tag type= "warning" v-for= "(item3, i3) in item2.children" :key= "item3.id" closable @close="removeRightsById(scope.row, item3.id)">
                    {{item3.authName}}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
          <!-- <pre>
            {{scope.row}}
          </pre> -->
        </template>
      </el-table-column>
      <!-- 索引列 -->
      <el-table-column type="index"></el-table-column>
       <el-table-column label="角色名称" prop="roleName"></el-table-column>
       <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
       <el-table-column label="操作" width="300px">
         <template slot-scope="scope">
          <el-button size="mini" type="primary" icon="el-icon-edit" @click= "showEditDialog(scope.row.id)">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click= "removeRolesById(scope.row.id)">删除</el-button>
          <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
         </template>
       </el-table-column>
    </el-table>
  </el-card>
   <!-- 添加角色的对话框 -->
  <el-dialog
  title="添加角色"
  :visible.sync= "addDialogVisible"
  width="50%" @close= 'addDialogClosed'>
  <!-- 主体区域 -->
  <el-form :model= "addForm" :rules= "addFormRules" ref="addFormRef" label-width="100px">
  <el-form-item label="角色名称" prop="roleName">
    <el-input v-model= "addForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="roleDesc">
    <el-input v-model= "addForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <!-- 底部区域 -->
  <span slot="footer" class="dialog-footer">
    <el-button @click= "addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click= "addRoles">确 定</el-button>
  </span>
</el-dialog>
<!-- 修改角色的对话框 -->
<el-dialog
  title="编辑角色"
  :visible.sync= "editDialogVisible"
  width="50%" @close= 'editDialogClosed'>
  <!-- 内容区域 -->
  <el-form :model= "editForm" :rules= "editFormRules" ref="editFormRef" label-width="100px">
  <el-form-item label="角色名称" prop="roleName">
    <el-input v-model= "editForm.roleName"></el-input>
  </el-form-item>
   <el-form-item label="角色描述">
    <el-input v-model= "editForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <!-- 底部区域 -->
  <span slot="footer" class="dialog-footer">
    <el-button @click= "editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click= "editRolesInfo">确 定</el-button>
  </span>
</el-dialog>
<!-- 分配权限的对话框 -->
<el-dialog
  title="提示"
  :visible.sync="setRightsDialogVisible"
  width="50%" @close='setRightsDialogClosed'>
  <!-- 树形控件 -->
  <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key='id' default-expand-all :default-checked-keys='defKeys' ref="treeRef"></el-tree>
  <!-- 底部区域 -->
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightsDialogVisible = false">取 消</el-button>
    <el-button type="primary"  @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>
<script>
export default {
  data () {
    return {
      // 所有角色的列表数据
      rolesList: [],
      // 控制对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单验证的规则对象
      addFormRules: {
        roleName: [{ required: true, message: '请输入角色名', trigger: 'blur' }],
         roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }]
      },
      // 控制修改角色的对话框的显示隐藏
      editDialogVisible: false,
      // 查询到的角色信息对象
      editForm: {},
      // 修改角色的验证规则对象
      editFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }]
      },
      // 控制分配权限对话框的显示与隐藏
      setRightsDialogVisible: false,
      // 所有权限的列表数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
   this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
   async getRolesList () {
    const { data: res } = await this.$http.get('roles')
    if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
    this.rolesList = res.data
    // console.log(this.rolesList)
    },
    // 监听添加角色关闭的对话框
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击添加新角色
    addRoles () {
       this.$refs.addFormRef.validate(async valid => {
        //  console.log(this.addForm)
        if (!valid) return
        // 发起请求添加新角色
      const { data: res } = await this.$http.post('roles', this.addForm)
      if (res.meta.status !== 201) {
        return this.$message.error('添加角色失败！')
      }
      this.$message.success('添加角色成功')
      // 隐藏添加角色的对话框
      this.addDialogVisible = false
      // 重新获取角色列表数据
      this.getRolesList()
       })
    },
    // 展示修改角色的对话框
   async showEditDialog (id) {
    //  console.log(id)
  const { data: res } = await this.$http.get('roles/' + id)
  if (res.meta.status !== 200) return this.$message.error('查询角色信息失败')
  this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editRolesInfo () {
      this.$refs.editFormRef.validate(async valid => {
          // console.log(valid)
          if (!valid) return
          // console.log(this.editForm)
          // 发起修改角色的请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) return this.$message.error('更新角色信息失败！')
        // 关闭对话框
        this.editDialogVisible = false
        // 重新获取角色列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功！')
          })
    },
    // 根据id删除角色
   async removeRolesById (id) {
      // console.log(id)
      // 弹框询问是否删除角色
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => {
          return err
        })
        // console.log(confirmResult)
        if (confirmResult !== 'confirm') return this.$message.info('已取消删除！')
        // 发起请求删除角色
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')
      // 重新加载用户数据
      this.getRolesList()
      // 提示删除成功的消息
      this.$message.success('删除角色成功！')
    },
    // 根据id删除权限
   async removeRightsById (role, rightsId) {
      // 弹框提示用户是否要删除
      const confirmResule = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => {
          return err
        })
        if (confirmResule !== 'confirm') return this.$message.info('已取消删除！')
        // console.log('ok')
        // 发起请求删除权限
       const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightsId}`)
       if (res.meta.status !== 200) return this.$message.error('删除权限失败！')
      //  会发生tab也得完整刷新
      //  this.getRolesList()
      role.children = res.data
       this.$message.success('删除权限成功！')
      },
      // 展示分配权限的对话框
     async showSetRightsDialog (role) {
       this.roleId = role.id
        // 发起请求获取所有权限的列表数据
       const { data: res } = await this.$http.get('rights/tree')
       if (res.meta.status !== 200) return this.$message.error('获取权限列表数据失败！')
      //  把获取到的数据保存到data中
       this.rightsList = res.data
      //  console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
        this.setRightsDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id，并保存到defkeys数组中
      getLeafKeys (node, arr) {
        // 如果当前节点不包括children属性则是三级节点
        if (!node.children) return arr.push(node.id)
        node.children.forEach(item => {
          this.getLeafKeys(item, arr)
        })
      },
      // 监听分配权限对话框的关闭事件
      setRightsDialogClosed () {
        this.defKeys = []
      },
      // 点击为权限分配角色
     async allotRights () {
        const keys = [
          // 获取所有选中的id数组
          ...this.$refs.treeRef.getCheckedKeys(),
          // 获取所有半选中的id数组
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        // console.log(keys)
        const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) return this.$message.error('分配权限失败！')
      this.$message.success('分配权限成功！')
      // 重新获取列表
      this.getRolesList()
      // 关闭对话框
      this.setRightsDialogVisible = false
      }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
